Automatic stop for disk records for talking machines



J. F. BL'AND.

AUTOMATIC STOP FOR DISK'QRECORDS FOR TALKING MACHINES.

APPLICATION FILED IIIAY I1, 1921.

1,41 O, 1 58. Patented Mar. 21, 1922.

- Lil l UNITED STATI-:s

JOSEPH FRANKLIN BLAND, F WINSTON-SALEM, NORTH CAROLINA.

AUTOMATIC s'ior ron DISK RECORDS Fon TALKING MACHINES.

Application led May 17,

' To all 'whom t may cor/ccm:

'f will enable others skilled in the'art to which it appertains to makeand'use the same.

My invention relates to improvements in automatic stops for theturn-tables of disk record talking machines, lsuch as Victrolas,

or any other talking'machine in which a rotating disk is used. I

According to my invention I provide a base which is permanently attachedto the top of the cabinet of the machine and on which a sliding bracketis mounted. This bracket is provided with a hinged weighted arm whichcarries a brake pad of felt or other similar material, adapted to engagethe turn-table o't' the machine exterior to the periphery vof the disksuperposed thereon.

Vhen not in actual engagement as a stop or brake, the weighted arm isnormally supported against a stanchion carried by the inner end of thesliding bracket, and said weighted arm is held in the uplifted posi tionby gravity, until the center of gravity of said aiin and the partscarried thereby is displaced automatically by the movement of the tonearm. When the tone arm has almost reached the predetermined limit ot itstravel, the weighted arm is pushed outwards and falls by gravity,causing the felt pad to strike the turn-table carrying the disk, thusacting as a brake to stop same without undue shock.

The invention is intended to be applicable to vany of the well knowntypes o1 talking machines on which a disk record is used, and the partsare so arranged that they may be readily attached to or removed from thetop of the `boi; or cabinet ofthe machine. A

The device is made adjustable so as to apply it to different makes vofmachine, in which therposition of thetone arm varies withinlimits.When'the device is onceset for any particular machine it does not haveto be altered with that machine.

The' device is also intended to provide Specification of Letters Patent.

Patented Mar. 21, 1922. i921. se'riai No. 470,322.

for Stopping the turn-table'by hand whenever desired at any time duringthe rotation of said turn-table, and this may be' done by simply tiltingthe-weighted arm by hand and allowing it to nfall and to engage theturn-table irrespective of what'may be the position of vthe tone armwith Aregard to the record. Inother words when :thedevice is properlyyset andthe weighted arm is raised, it will operate automatically vwhenthe tone arm reaches the position at almost the predetermined end otitstravel', and may be caused to operate by hand and not` automatically atanytime while the record is turning.

My invention will be more lfully under-Y stood after reference to theaccompanying drawings, in which like parts are indicated by similarreference symbols throughout the several views, and in which :-V

Figure l is a plan :view 'of a Victrola machine with the tone arm partlybroken away, and with the said arm in the opera.-

tive position for causing the `needle .toengage a disk.

Figure 2 is a similar view to'Fi ure 1,

but shows the tone arm 'in the position for actuating the automaticstop, and' shows the automatic stop in the lowered and operatingposition. Y

Figure 3 is a side elevation of the apparatus shown in Figure l, partsbeing broken away.

Figure 4 is a side elevation of the apparatus shown in Figure 2, partsbeingV broken away.

yFigure 5 is a `View seen from the yleft of Fig. 1, with theparts Vinthe position shown inthat figure.

Figure 6 is a plan view similar to'Figure 2, but showsa modified form ofautomatic stop; and. Y

Figure 7 shows 'a section along the rline 7-7 of F igure' 6, but'onalarger scale.

AV represents the vcabinet or sound box PATENT orifice.y

used with the machine, which may be of any I make no claim totheconstruction and operation of the turn-table or the means for rotatingthe same.

D represents ythe disk which maybe ot'V any desired size,whether'standard or otherwise. l

' E `represents the tone 'arm' which is pivoted in the usual way to .thesleeveF. The tone arm is provided at its forward end with a T-headAcomprising the sleeve E in which .the goosemeck H is pivoted, whichcarries the reproducer .l to which `is attached `the fneedleKinV theusual Way. Y

v.Alici the parts hitherto described are preferably of Standard orpreferred make and 1in. no sense a part of my invention.

My invention relates `particularly to the automatic sto -orbrakingdevice which will nombe descri fd. f Y

" Referring `Iirstto the construction shown in `Figures'l to`5,in whichthe brake pad is applied horizontally, M ,represents a base plate whichis connected to the top of the '.Ilhis bracket maybe provided with ahandle nf for convenience in manipulating the same.` Thehracketismounted to `slide without unnecessary- .friction in the guides M.

`Tlievertical fin N is slotted at its base, as atm", to permit the saidfin to slide over the corresponding guide M. The fin N is provided-.witha` forwardly projecting;y ear am* to `whichthe arm P is pivoted, as bythe pin y). This arm is weighted at the free end as at P. andisprovidedwith a Wing Q to' which `the brake pad g, of 4felt or similarmaterial, is secured.

rTheadjusting` ofthe device to any ot the different `types of machinesnow generally in '1.- use is effected by means of an `adjustable.

vbutton R, carried bythe screw .S which en gages the screw threads inthe arm` P, and is turned by the knurled h'ead S. In order tosetrthedevi.cepennanently for any given machine, a lock nut T isprovided to prevent the button R from beiner turned backwardsaccidentally in any Way. A

A The operationof the device isas follows: Supposingthe weighted i arm Ptobe in the lowered position shown in Figs@ and 4, swing` the .tonearmtothe left so that the needle will be in the position at which it isdesired to stop: the engagement of the same with the record. Theposition of the needle at which it maybe desired to stop the disk maybein orfout. Having determined the position at which the record is to stoprelatively to the needle, hold the tone arm in this position', indicatedfor instance in Fig.,

the turn-table beingrotated, the tone arm under the control of theneedle will be graduallly .moved towards the button R.

As this button is reached there will be a gentle contact, first, withthe tone arm and then a still further movementot the tone arm to theleft will move the weighted arm P so that its center ot gravity willfall to the lett of its pivot, `and the weighted arm will swing downunder gravity from the `position shown inFig. 3 to the position shown inFigs. Qand Ll. This will cause thebrake pad q to bear against thesurface b `offthe turnftable B,and this pad being pressed `on by theleverage ofthe weighted arm will exert suilicient braking effect tosoonbring the turn-table to a stop.

It will be noted that the weight P acts'v at a longaleveragc relative tothe stop, and, therefore, a: `comparatively small weight maybe used.This isdesirable so as not to transmit unnecessary shocks to themachine. l After ythcVturn-table has been stopped a new record may beapplied and the operation `may .be repeated' indefinitely.

It it is desired to stop the turntable at any time beforeV the automaticaction takes effect, it will be sujtiicient merely to swing the weightedarm to the lett by a touch of the finger. lt will then drop under thehand control and will apply the brake as before( f v Y Thus it will beseen that the device may he used to automatically stop the turn-tableatA any predetermined.position of the needle relatively to the record.and it may also be caused `to stop thc turntable by hand control at anyrelative Vposition, of the needle to the record, or whenthe needle isnot onthearecord at all. e Y

` Tn the modifications shown in Figs. 6 .and 7, the parts are generallysimilar to those hitherto described, and the operation of the device isprecisely 'the same except that instead ot a braking;r eili'ect byhorizontal pressure, of `the brake pad on .the top of vthe turntable, awedging effect of the brake pad on the edge ot' the turn-table issecured.. This-result is accomplished lby setting the wing Q at `aninclinevinstead'ot at a `right angle to the. arm uP", so that a wedgingeffect `of the pad Q on. .the periphery bg of the Vturn-table B issecured. This is shown especially in Figure `7, in which the brake isshown in lthe lengaging position in full and yet which will not slipbackwards when the brake is applied.

It will be obvious that various other modications might be made in theherein described apparatus, and in the construction, combination andarrangement of parts which could be used Without departing from thespirit of my invention; and I do not mean to limit the invention to suchdetails except as particularly pointed out in the claims.

Having thus described my invention what I claim and desire to secure byLetters APatent of theUnit-ed States is Y 1. A stop arrangement for usewith disk record talking machines provided with a. swinging tone armcyomprising a sliding bracket, a Weighted arm pivoted thereto, a brakeWing carried by said arm, means carried by said sliding bracket forsupporting said arm in the raised position, and a stop carried by saidarm adapted to be engaged by the movement of said tone arm as the tonearm reaches a predetermined position in its angular movement,substantially as described.

2. A stop arrangement for use with disk record talking machines providedWith a swinging tone arm comprising a sliding bracket, a Weighted armpivoted thereto, a brake wing carried by said arm, means carried by saidsliding bracket for supporting said arm in the raised position, and alaterally projecting adjustable stop carried `by said arm adapted to beengaged by the movement of said tone arm as the tone arm reaches apredetermined position in its angular movement, substantially asdescribed.

3. A stop arrangement for use with disk record talking machines providedWith a turn-table and a swinging tone arm comprising a sliding bracket,a Weighted arm pivoted thereto, a brake wing carried by said armprovided with a padded brake shoe, adapted to engage. said turn-tableexterior to the disk, means carried by said sliding bracket forsupporting said arm in the raised position, and a stop carried by saidarm adapted to be engaged by the movement of said tone arm as the tonearm reaches a predetermined position in its angular movement,substantially as describe-d.

4. A stop arrangement for use with disk record talking machines providedwith a turn-table and a swinging `tone arm comprising a sliding bracket,a Weighted arm pivoted thereto, a brake Wing carried by said armprovided With a padded brake shoe,

adapted to engage said turn-table exterior' to the disk, means carriedby said sliding bracket for supporting said arm in the raised position,and a laterally projecting adjustable stop carried by said arm adaptedto be engaged by the movement of said tone arm as the tone arm reaches apredetermined position in its angular movement, substantially asdescribed.

A stop arrangement for use with disk record talking machines providedwith a swinging tone arm comprising a slidingV bracket, a Weighted armpivoted thereto, a brake Wing carriedby said arm, a vertically disposedstandard carried by said sliding bracket for supporting said arm in theraised position, and a stop carried by said arm adapted to be engaged bythe movement of said tone arm as the tone armfreaches a predeterminedposition in its angular movement, substantially as described.

6. A stop arrangement for use with disk record talking machines providedwith a swinging tone arm comprising a sliding bracket, a Weighted armpivoted thereto, a brake wing carried by said arm, a vertically disposedstandard carried by said sliding bracket for supporting said arm in theraised position, and a laterally projecting adjustable stop carriedbysaid arm adapted to be engaged by the movement of said tone

